I noticed Cryorig H7 has 10-25 dBA from its official page. What is the range of dBA mean?I would suggest something like Cryoirig H7, but the price seems about 5 quid too high.
https://www.overclockers.co.uk/cryorig-h7-single-tower-heatsink-with-120mm-fan-hs-008-cy.html
be quiet! Pure Rock.
https://www.overclockers.co.uk/be-quiet-pure-rock-cpu-cooler-120mm-hs-010-bq.html
Raijintek Themis
https://www.overclockers.co.uk/raijintek-themis-black-heatpipe-cpu-cooler-pwm-120mm-hs-015-rt.html